Meningitis. US Centers for Disease Control and Prevention website. Available at:
http://www.cdc.gov/meningitis/index.html. Updated October 1, 2015. Accessed November 11, 2015.

Meningococcal: Who needs to vaccinate? Centers for Disease Control and Prevention website. Available at: http://www.cdc.gov/vaccines/vpd-vac/mening/who-vaccinate.htm. Updated October 22, 2015. Accessed November 11, 2015.